1. Identify the Controls and Variables

2. 1. Independent (Manipulated) Variable
Smithers thinks that a special juice will increase the productivity of workers. He creates two groups of 50 workers each and assigns each group the same task (in this case, they're supposed to staple a set of papers). Group A is given the special juice to drink while they work. Group B is not given the special juice. After an hour, Smithers counts how many stacks of papers each group has made. Group A made 1,587 stacks, Group B made 2,113 stacks.
1. Independent (Manipulated) Variable
2. Dependent (Responding) Variable
3. Control Group
4. Hypothesis:
5. What should Smithers' conclusion be?
With Juice/ Group A
Work faster
With out Juice/ Group B
If Smithers gives his workers Juice then they will work faster.
Does not work
6. How could this experiment be improved
Give the juice before they work

3. 7. What was the initial observation? Identify the- 8. Control Group
Homer notices that his shower is covered in a strange green slime. His friend Barney tells him that coconut juice will get rid of the green slime. Homer decides to check this this out by spraying half of the shower with coconut juice. He sprays the other half of the shower with water. After 3 days of "treatment" there is no change in the appearance of the green slime on either side of the shower.
7. What was the initial observation?
Identify the-
8. Control Group
9. Independent (Manipulated) Variable
10. Dependent (Responding) Variable
11. Hypothesis:
12. What should Homer's conclusion be?
Green Slime
½ of shower with water
Coconut Juice
Green Slime goes away
If Homer uses coconut juice then the green slime will go away
Did not work

4. 13. Independent (Manipulated) Variable
Bart believes that mice exposed to radiowaves will become extra strong (maybe he's been reading too much Radioactive Man). He decides to perform this experiment by placing 10 mice near a radio for 5 hours. He compared these 10 mice to another 10 mice that had not been exposed. His test consisted of a heavy block of wood that blocked the mouse food. he found that 8 out of 10 of the radiowaved mice were able to push the block away. 7 out of 10 of the other mice were able to do the same.
Identify the-
13. Independent (Manipulated) Variable
14. Dependent (Responding) Variable
15. Control Group
16. Hypothesis:
17. What should Bart's conclusion be?
18. How could Bart's experiment be improved?
Microwaved Mice
Stronger Mice
Non-Microwaved Mice
If Bart microwaves the mice then they will be stronger
Inconclusive
More Mice

5. 16. Independent (Manipulated) Variable
Krusty was told that a certain itching powder was the newest best thing on the market, it even claims to cause 50% longer lasting itches. Interested in this product, he buys the itching powder and compares it to his usual product. One test subject (A) is sprinkled with the original itching powder, and another test subject (B) was sprinkled with the Experimental itching powder. Subject A reported having itches for 30 minutes. Subject B reported to have itches for 45 minutes
Identify the-
16. Independent (Manipulated) Variable
17. Dependent (Responding) Variable
18. Control Group
19. Hypothesis:
20. Explain whether the data supports the advertisements claims about its product.
New Itching Powder
Itch lasts 50% longer
Original Itching Powder
If Krusty uses the new itching Powder then the itch will last 50% longer
Yes it does

6. Lisa is working on a science project
Lisa is working on a science project. Her task is to answer the question: "Does Rogooti (which is a commercial hair product) affect the speed of hair growth". Her family is willing to volunteer for the experiment.
16. Independent (Manipulated) Variable
17. Dependent (Responding) Variable
Control Group
Hypothesis:
Rogooti on hair
Hair grows faster
Nothing on hair
If I use Rogooti on my hair then my hair will grow faster.